is one piece episode 752 filler?

The Straw Hat Pirates and the Barto Club stare in awe at the giant elephant that Zou is located on as they draw closer to it. Suddenly, Luffy sees the Thousand Sunny docked at one of the elephant's back legs, and the Barto Club is excited to see it.

Franky sees that the ship has no major damage, so their crewmates must have escaped from the Big Mom Pirates. Luffy calls out to Sanji, Nami, Chopper, Brook, and Momonosuke, but gets no answer, and he leaps over onto the empty Sunny.